Scale all pages in a PDF with CapturePage

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Here is some C# code I wrote to scale all pages on a PDF by 70% and it shows how to use CapturePage.  It also shows how to construct the loop to process all pages and maintain the original page order. 

  private void button8_Click(object sender, EventArgs e)
  { 
    File.Delete("newpages.pdf");   // Delete the old file just in case.

    double pageWidth, pageHeight, horizBorder, vertBorder;
    double scaleFactor = 0.70;     // 70 % scaling reduction.
    int capturedPageId;
    int ret;

    QP.LoadFromFile("Pages.pdf");
    QP.SetOrigin(1);

    int numPages = QP.PageCount();
    int pageId;

    for (int i = 1; i <= numPages; i++)
    {
       QP.SelectPage(1);                       // Always select page 1 as the pages get deleted.
       pageWidth = QP.PageWidth();
       pageHeight = QP.PageHeight();
       horizBorder = pageWidth * (1.0 - scaleFactor) / 2;
       vertBorder = pageHeight * (1.0 - scaleFactor) / 2;

       capturedPageId = QP.CapturePage(1);     // This deletes the page from the document.

       pageId = QP.NewPage();
       QP.SetPageDimensions(pageWidth, pageHeight);

       ret = QP.DrawCapturedPage(capturedPageId, horizBorder, vertBorder, pageWidth - 2 * horizBorder, pageHeight - 2 * vertBorder);
     }

     QP.SaveToFile("newpages.pdf");
     System.Diagnostics.Process.Start(@"newpages.pdf");
   }

Edited by AndrewC - 28 Nov 13 at 12:57PM

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AndrewC Members Profile Find Members Posts Moderator Group Joined: 08 Dec 10 Location: Geelong, Aust Status: Offline Points: 841	Post Options Post Reply Quote AndrewC Report Post Thanks(2) Quote Reply Topic: Scale all pages in a PDF with CapturePage Posted: 26 Oct 11 at 4:58AM
	Here is some C# code I wrote to scale all pages on a PDF by 70% and it shows how to use CapturePage. It also shows how to construct the loop to process all pages and maintain the original page order. private void button8_Click(object sender, EventArgs e) { File.Delete("newpages.pdf"); // Delete the old file just in case. double pageWidth, pageHeight, horizBorder, vertBorder; double scaleFactor = 0.70; // 70 % scaling reduction. int capturedPageId; int ret; QP.LoadFromFile("Pages.pdf"); QP.SetOrigin(1); int numPages = QP.PageCount(); int pageId; for (int i = 1; i <= numPages; i++) { QP.SelectPage(1); // Always select page 1 as the pages get deleted. pageWidth = QP.PageWidth(); pageHeight = QP.PageHeight(); horizBorder = pageWidth * (1.0 - scaleFactor) / 2; vertBorder = pageHeight * (1.0 - scaleFactor) / 2; capturedPageId = QP.CapturePage(1); // This deletes the page from the document. pageId = QP.NewPage(); QP.SetPageDimensions(pageWidth, pageHeight); ret = QP.DrawCapturedPage(capturedPageId, horizBorder, vertBorder, pageWidth - 2 * horizBorder, pageHeight - 2 * vertBorder); } QP.SaveToFile("newpages.pdf"); System.Diagnostics.Process.Start(@"newpages.pdf"); } Edited by AndrewC - 28 Nov 13 at 12:57PM

Carneno Members Profile Find Members Posts Team Player Joined: 19 Apr 11 Status: Offline Points: 24	Post Options Post Reply Quote Carneno Report Post Thanks(0) Quote Reply Posted: 27 Mar 12 at 1:40PM
	Hello, I am using QuickPDF Library 8.11 Active-x in a VB 6.0 program. It uses LoadFromFile to load PDF documents, overlay the bottom part of the PDF with a box and some text then print them. I would like to reduce the size of the content for each page so that it appears on the top 80% of the page and add the box and text at the bottom so that it does not overlay the original PDF page. Will this sample code allow me to do that? It should not be a problem for me to convert to VB 6.0. Any help would be gratefully appreciated. Thanks, Tony
	Stop The World, I want To Get Off.

AndrewC Members Profile Find Members Posts Moderator Group Joined: 08 Dec 10 Location: Geelong, Aust Status: Offline Points: 841	Post Options Post Reply Quote AndrewC Report Post Thanks(0) Quote Reply Posted: 27 Mar 12 at 2:27PM
	Yes. It will work very well. 1. Change scaleFactor to 0.80 for 80%. 2. You will need to move the image up the page a little as the current implementation centres in on the page. The following change should do what you need. ret = QP.DrawCapturedPage(capturedPageId, horizBorder, vertBorder * 2, pageWidth - 2 * horizBorder, pageHeight); Also : You are entitled to a free upgrade to 8.14 which has many bug fixes and improvements. It can be downloaded from http://www.quickpdflibrary.com/products/quickpdf/updates.php Edited by AndrewC - 19 Mar 14 at 11:09AM

Carneno Members Profile Find Members Posts Team Player Joined: 19 Apr 11 Status: Offline Points: 24	Post Options Post Reply Quote Carneno Report Post Thanks(0) Quote Reply Posted: 27 Mar 12 at 3:14PM
	Excellent Andrew. Thanks very much. Tony
	Stop The World, I want To Get Off.

Pulkitsoft Members Profile Find Members Posts Beginner Joined: 10 Oct 20 Location: New Delhi Status: Offline Points: 16	Post Options Post Reply Quote Pulkitsoft Report Post Thanks(0) Quote Reply Posted: 27 Feb 21 at 9:35AM
	Is Anyone can help? Above given page scaling code working very well. I wants to specify left, top, bottom, right margin in above given code. Note: Output page not to be stretch.

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3527	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 01 Mar 21 at 10:41PM
	You can't set it directly. All related functions are working with top, left, width and height - so you have to do some calculations ;-)
	Cheers, Ingo